List all disks
diskutil list
The disk4 and disk5 are linked
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Backup 465.6 GB disk0s2
3: Apple_HFS Data 533.6 GB disk0s3
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS Container disk3 255.9 GB disk1s2
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *128.0 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Microsoft Basic Data OldSSD 127.8 GB disk2s2
/dev/disk3 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +255.9 GB disk3
Physical Store disk1s2
1: APFS Volume OSX 43.2 GB disk3s1
2: APFS Volume Preboot 19.3 MB disk3s2
3: APFS Volume Recovery 509.8 MB disk3s3
4: APFS Volume VM 4.3 GB disk3s4
/dev/disk4 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk4
1: EFI EFI 209.7 MB disk4s1
2: Apple_APFS Container disk5 239.8 GB disk4s2
/dev/disk5 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +239.8 GB disk5
Physical Store disk4s2
1: APFS Volume BadSSD 852.0 KB disk5s1
2: APFS Volume Preboot 19.3 MB disk5s2
3: APFS Volume Recovery 509.8 MB disk5s3
4: APFS Volume VM 4.3 GB disk5s4
Delete APFS container in disk5
diskutil apfs deleteContainer /dev/disk5
List all disk again to see the result
diskutil list
The disk5 deleted and updated disk4 status to Untitled
like
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Backup 465.6 GB disk0s2
3: Apple_HFS Data 533.6 GB disk0s3
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS Container disk3 255.9 GB disk1s2
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *128.0 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Microsoft Basic Data OldSSD 127.8 GB disk2s2
/dev/disk3 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +255.9 GB disk3
Physical Store disk1s2
1: APFS Volume OSX 43.2 GB disk3s1
2: APFS Volume Preboot 19.3 MB disk3s2
3: APFS Volume Recovery 509.8 MB disk3s3
4: APFS Volume VM 4.3 GB disk3s4
/dev/disk4 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk4
1: EFI EFI 209.7 MB disk4s1
2: Apple_HFS Untitled 239.7 GB disk4s2
Now, Format the disk4 Untitled
to ExFat and named SSD20180321
or usign the Disk Utility
app
diskutil eraseDisk EXFAT SSD20180321 /dev/disk4
Reference